The Seahawks added some veteran depth to their backfield with the signing of former Buffalo Bills and New Orleans Saints running back C.J. Spiller, which will be officially announced on Thursday.

The Seahawks added some veteran depth to their backfield with the signing of former Buffalo Bills and New Orleans Saints running back C.J. Spiller, which will be officially announced on Thursday.

Photo: Joe Robbins/Getty Images

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C.J. Spiller of the New Orleans Saints reacts during a game at Mercedes-Benz Superdome on September 1, 2016 in New Orleans, Louisiana. (Photo by Jonathan Bachman/Getty Images)

C.J. Spiller of the New Orleans Saints reacts during a game at Mercedes-Benz Superdome on September 1, 2016 in New Orleans, Louisiana. (Photo by Jonathan Bachman/Getty Images)

Photo: Jonathan Bachman/Getty Images

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C.J. Spiller of the New Orleans Saints runs with the ball during the first half of a game at the Mercedes-Benz Superdome on August 26, 2016 in New Orleans, Louisiana. (Photo by Jonathan Bachman/Getty Images)

C.J. Spiller of the New Orleans Saints runs with the ball during the first half of a game at the Mercedes-Benz Superdome on August 26, 2016 in New Orleans, Louisiana. (Photo by Jonathan Bachman/Getty Images)

Photo: Jonathan Bachman/Getty Images

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C.J. Spiller of the Buffalo Bills is carted off the field after suffering a season ending collar bone injury at Ralph Wilson Stadium on October 19, 2014 in Orchard Park, New York. (Photo by Brett Carlsen/Getty Images)

C.J. Spiller of the Buffalo Bills is carted off the field after suffering a season ending collar bone injury at Ralph Wilson Stadium on October 19, 2014 in Orchard Park, New York. (Photo by Brett Carlsen/Getty

C.J. Spiller of the Buffalo Bills tries to avoid the tackle by Tahir Whitehead #59 of the Detroit Lions in the third quarter at Ford Field on October 05, 2014 in Detroit, Michigan. (Photo by Joe Sargent/Getty Images)

C.J. Spiller of the Buffalo Bills tries to avoid the tackle by Tahir Whitehead #59 of the Detroit Lions in the third quarter at Ford Field on October 05, 2014 in Detroit, Michigan. (Photo by Joe Sargent/Getty

C.J. Spiller of the Buffalo Bills is tackled by J.J. Watt #99 of the Houston Texans in the first quarter in a NFL game on September 28, 2014 at NRG Stadium in Houston, Texas. (Photo by Bob Levey/Getty Images)

C.J. Spiller of the Buffalo Bills is tackled by J.J. Watt #99 of the Houston Texans in the first quarter in a NFL game on September 28, 2014 at NRG Stadium in Houston, Texas. (Photo by Bob Levey/Getty Images)

Photo: Bob Levey/Getty Images

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C.J. Spiller of the Buffalo Bills score a touchdown during the second quarter of their game against the Chicago Bears at Soldier Field on September 7, 2014 in Chicago, Illinois. (Photo by Jonathan Daniel/Getty Images)

C.J. Spiller of the Buffalo Bills score a touchdown during the second quarter of their game against the Chicago Bears at Soldier Field on September 7, 2014 in Chicago, Illinois. (Photo by Jonathan Daniel/Getty

RENTON -- The Seattle Seahawks have signed former first-round pick C.J. Spiller to a one-year deal, the team announced Wednesday afternoon.

Head coach Pete Carroll confirmed the signing in a conference call with New York reporters on Wednesday, before an official announcement came from the team.

Spiller, 29, was released by New Orleans on Sept. 13 after signing a four-year, $18 million free-agent deal with the Saints in 2015.

The No. 9 overall pick of the 2010 draft out of Clemson, Spiller spent his first five years in the league with Buffalo, rushing for 3,321 yards and 12 touchdowns with the Bills while adding 158 receptions for 1,195 yards and six more scores.